Philadelphia-based Caps fan here. Was at the game. Going to set some facts straight.
First off, a picture of my wristband below (didn't throw it). They were battery powered wristbands, programmed to each seat/section used as part of pre-game and intermission "lights shows" (or basically any time it was appropriate to dim the lights for a video). The light shows had nothing to do with the ceremony honoring Ed Snider.
I'd say there were at least a couple hundred wristbands thrown to the ice, but it's important to remember that around 19,000 people fit in the Wells Fargo Center. While a decent chunk of those people left when Carlson made the game 4-1, it was still a relatively small minority of Flyers fans throwing them on the ice. A non-trivial minority, but a minority nonetheless.
On the other hand, there were pretty overwhelming boos when Orpik was carried off the ice, so it's not like the Flyers faithful are all class.